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2 This is a safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid injury or death 1.0 Product Information DURAPAC Aluminium Pull Hydraulic Cylinders are engineered to meet International Standards for Performance and Safety. The RAP Series is a lightweight, aluminium cylinder that may be used in all positions and has a hydraulic pulling action and spring loaded piston rod that extends the piston rod when pressure is released. These cylinders feature a hard chrome steel piston rod and bronze overlay on the piston bearing area to reduce scoring and increase service life. The RAP Series cylinders are suitable for use in steel structural works, ship building and tower tensioning. Lightweight aluminium body for maximum portability Return spring is sized to ensure efficient piston rod return and maximum spring life Hard chrome plated piston rod for maximum corrosion resistance and cylinder life Removable clevis eyes allow the use of custom attachments Special skill, knowledge and training may be required for a specific task and the product may not be suitable for all jobs. The user must ultimately make the decision regarding suitability of the product for any given task and assume the responsibility of safety for all in the work area. Contact a Durapac representative if you are unsure of your cylinder s suitability for a particular application. 2.0 Receiving Instructions It is recommended prior to use that an inspection be done by qualified personnel and that any missing or damaged parts, decals, warning/safety labels or signs are replaced with Durapac authorised replacement parts only. Any cylinder that appears to be damaged in any way, is worn, leaking or operates abnormally should be removed from service immediately until such time as repairs can be made. Any cylinder that has been or suspected to have been subject to a shock load should be removed from service immediately until inspected by a Durapac authorised service centre. Owners and operators of this equipment should be aware that the use and subsequent repair of this equipment may require specialised training and knowledge. 3.0 Safety Save these instructions. For your safety, read and understand the information contained within. The owner and operator should have an understanding of this product and safe operating procedures before attempting to use this product. Instructions and safety information should be conveyed in the operator's native language before use of this product is authorised. Make certain that the operator thoroughly understands the inherent dangers associated with the use and misuse of the product. If any doubt exists as to the safe and proper use of this product as outlined in this factory authorised manual, remove from service immediately. DANGER: To avoid personal injury keep hands and feet away from work area during operation RAP Series SA Pull Cylinders - V1.0 Page 2 of 10

3 Do NOT handle pressurised hoses. Escaping oil under pressure can penetrate the skin causing serious injury. If oil is injected under the skin, see a doctor immediately Stay clear of loads supported by hydraulics. A cylinder, when used as a load lifting device, should never be used as a load holding device. After the load has been raised or lowered, it must always be blocked mechanically WARNING: The system operating pressure must not exceed the pressure rating of the lowest rated component in the system. Install pressure gauges in the system to monitor operating pressure. It is your window to what is happening in the system Always wear protective gear when operating hydraulic equipment. The operator must take precaution against injury due to failure of the tool or work piece(s) Do NOT hold or stand directly in line with any hydraulic connections while pressurising Do NOT attempt to disconnect hydraulic connections under pressure. Release all line pressure before disconnecting hoses All personnel must be clear before lowering load or depressurising the system Do NOT attempt to lift a load weighing more than the capacity of the cylinder IMPORTANT: If at any stage, the safety related decals become hard to read, these must be replaced Minimum age of the operator must be 18 years. The operator must have read and understood all instructions, safety issues, cautions and warnings before starting to operate the equipment. The operator is responsible for this activity towards other persons Do NOT lift hydraulic equipment by the hoses or couplers. Use the carrying handle or other means of safe transport Hydraulic equipment must only be serviced by a qualified hydraulic technician. For repair service, contact the Durapac authorised service centre in your area. To protect your warranty, use only high quality hydraulic oil CAUTION: KEEP HYDRAULIC EQUIPMENT AWAY FROM FLAMES AND HEAT. Hydraulic fluid can ignite and burn. Excessive heat will soften packings and seals, resulting in fluid leaks. Heat also weakens hose materials and packings. For optimum performance do not expose equipment to temperatures of 65 C (150 F) or higher. Protect all equipment from weld spatter No alteration should be made to this device 3.1 Hydraulic Cylinders Do NOT overload equipment. Overloading can cause equipment failure and possible personal injury. This device is not suitable for use as a support device! As the system load is lifted, use blocking and cribbing to guard against a falling load RAP Series SA Pull Cylinders - V1.0 Page 3 of 10

4 BE SURE SETUP IS STABLE BEFORE LIFTING LOAD. Cylinders should be placed on a flat surface that can support the load. Where applicable, use a cylinder base for added stability. Do not weld or otherwise modify the cylinder to attach a base or other support Avoid situations where loads are not directly centred on the cylinder piston. Offcentre loads produce considerable strain on cylinder and pistons. In addition, the load may slip or fall, causing potentially dangerous results Distribute the load evenly across the entire saddle surface. Always use a saddle to protect the piston (if one is provided). USE ONLY RIGID PIECES TO HOLD LOAD. Carefully select steel or wood blocks that are capable of supporting the load. Never use a hydraulic cylinder as a shim or spacer in any lifting or pressing application Never pressurise uncoupled couplers. Only use hydraulic equipment in a coupled system 3.2 Hydraulic Hoses & Fluid Transmission Lines Avoid short runs of straight line tubing. Straight line runs do not provide for expansion and contraction due to pressure and/or temperature changes Reduce stress in tube lines. Long tubing runs should be supported by brackets or clips. Before operating the pump, connections should be tightened securely and leak-free. Over tightening can cause premature thread failure or high pressure fittings to burst Should a hydraulic hose ever rupture, burst or need to be disconnected, immediately shut off the pump and release all pressure. Never attempt to grasp a leaking pressurised hose with your hands. The force of escaping hydraulic fluid can inflict injury Do NOT subject the hose to potential hazard such as fire, sharp objects, extreme heat or cold or heavy impact Do NOT allow the hose to kink, twist, curl, crush, cut or bend so tightly that the fluid flow within the hose is blocked or reduced. Periodically inspect the hose for wear Hose material and coupler seals must be compatible with the hydraulic fluid used. Hoses also must not come in contact with corrosive materials such as battery acid, creosote-impregnated objects and wet paint. Never paint a coupler or hose FAILURE TO HEED THESE WARNINGS MAY RESULT IN PERSONAL INJURY AS WELL AS PROPERTY DAMAGE. 4.0 Installation IMPORTANT: Always secure threaded port connections with high grade, non-hardening pipe thread sealant. Teflon tape can be used if only one layer of tape is used and it is applied carefully, two threads back, to prevent the tape from being introduced into hydraulic system, which could cause jamming of precision-fit parts RAP Series SA Pull Cylinders - V1.0 Page 4 of 10

5 CAUTION: Do NOT allow the piston rod to rotate when installing adaptors. Damage to the spring may prevent piston rod retraction 4.1 Know your cylinder, its limitations and how it operates before attempting to use. If in doubt, contact Durapac. 4.2 Make hydraulic connections; use a pump release valve or a 3-way valve and one hose for a single-acting cylinder. IMPORTANT: Fully hand-tighten all couplers. Loose coupler connections will block the flow of oil between the pump and the cylinder 4.3 Check all system fittings and connections to be sure they are tight and leak free. 4.4 Check oil level in reservoir before operating pump. 4.5 Remove air from the system Position the cylinder so that the piston rod is pointed down and the cylinder is lower than the pump. Advance and retract the cylinder several times, avoiding pressure build-up. Air removal is complete when the cylinder motion is smooth. 5.0 Operation IMPORTANT: Cylinder gland nut/stop ring is designed to take the full load, to reduce cylinder wear, use less than the full stroke where possible For complete operating instructions refer to the instruction sheet included with each pump. 5.1 Advancing and retracting the cylinder The RAP Series cylinders are a spring return cylinder and the speed of retraction is affected by the length of the hose and other restrictions in the line. Shift the valve on the pump to the advance position and run the pump to advance the cylinder. To retract the cylinder, shift the valve to the retract position. 5.2 Side Load Eliminate the presence of side load forces when using high tonnage cylinders. Side load can occur through: An eccentric load on the piston rod A horizontal load on a structure A structure and/or cylinder misalignment Non synchronised lifting actions RAP Series SA Pull Cylinders - V1.0 Page 5 of 10

6 6.0 Maintenance IMPORTANT: Use only good quality hydraulic fluid. Do NOT use brake fluid, transmission fluid, turbine oil, motor oil, alcohol, glycerine etc. Use of anything other than good quality hydraulic oil will void warranty and damage the cylinder and application. We recommend Durapac Hydraulic Oil or equivalent Equipment must only be serviced by a qualified hydraulic technician. For repair service, contact your local Durapac authorised service centre Damage to hydraulic hoses may not be detected during visual inspections. For this reason, Durapac recommends that hydraulic hoses be replaced on a regular basis Tighten connections as needed. Use non-hardening pipe thread compound when servicing connections Dirt, sand, etc. will quickly ruin any hydraulic system. Ensure that couplings are clean and free of foreign matter. After each use, clean couplings and attach dust caps. Maintenance is required when wear or leakage is noticed. Periodically inspect all components to detect any problem that may require service and maintenance. 6.1 Check for loose connections and leaks. 6.2 Replace damaged parts immediately. 6.3 Do not exceed oil temperature above 60 o C. 6.4 Keep all hydraulic components clean. 6.5 Use dust caps when cylinder is disconnected from the hose. Keep entire cylinder clean to prolong cylinder life. 6.6 Wipe thoroughly clean and store cylinders upright (to prevent seal distortion) in a clean, dry environment. Avoid temperature extremes. 6.7 Change hydraulic oil in your system as recommended in the pump instruction sheet. RAP Series SA Pull Cylinders - V1.0 Page 6 of 10

8 Problem Cause Solution Cylinder does not move Loose couplers Tighten couplers Cylinder extends only partially Cylinder moves slower than normal Faulty coupler Verify that female coupler is not locked up (ball wedged into seat) Replace both male and female couplers Improper valve position Close release valve or shift to new position Low or no hydraulic fluid in Fill and bleed the system pump reservoir Air-locked pump Prime pump according to pump operating instructions Pump not operating Check pump s operating instructions Load is above the capacity of the system Use the correct equipment Low or no hydraulic fluid in Fill and bleed the system pump reservoir Load is above the capacity of Use the correct equipment the system Sticking or binding cylinder Check for dirt or leaks Check for bent, misaligned, worn parts or defective packings Loose couplers Tighten couplers Restricted hydraulic line or Clean fitting Replace if damaged Pump not operating correctly Check pump s operating instructions Repair or replace as necessary Low fluid level in pump Fill and bleed the system reservoir Leaking cylinder seals Replace worn seals Check for excessive contamination or wear Replace contaminated fluid as necessary RAP Series SA Pull Cylinders - V1.0 Page 8 of 10

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